MS Locke c.33, fols 27-28
 Guardbook containing sheets (bound together at a later stage), used for notes on Locke’s reading, arranged according to his method for commonplacing. Folios 27-28 are the two leaves of a quire formed by folding a sheet.
 Size, not of the leaves but of the complete sheet, 407 × 329 mm.
 Fol. 27 has a watermark consisting of a lion, probably that of the Seven Provinces, holding seven arrows and a sword in a coat of arms containing five fleurs-de-lis (see Heawood 3141 or 3144). Fol. 28 has a barely legible countermark, probably two letters, the first letter possibly a ‘D’.
Stitching and pins
 No stitching. The middle of the outer edge has a hole, which can also be found in fols 8-14 and 17-44 (the edges of fols 15-16 are frayed but may have had a similar hole). Along the horizontal edges of the folios are rows of tiny punctures that allowed Locke to draw the vertical lines that demarcated the columns needed for his method of common-placing.
Quires and page numbers
 The letter of the quire containing fols 27-28 is ‘C’ (in lower left margin of fol. 27r).
 Folios 27r, 28r and 28v have ‘Adversaria Oct. 88’ in the upper left corner. In addition, the marginal entry 90 can be found at some point on each of the four pages of fols 27-28, and appears at the very top of fol. 27v, i.e. the page of ‘Ignorantia’.
 Locke’s hand.